Kinetic- or Thermodynamic-Growth Formation of Pd Nanocrystals: a combined TEM-DLS Approach

2008 ◽  
Vol 1087 ◽  
Author(s):  
Gilles Berhault ◽  
Marta Bausach
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Growth Kinetics ◽  
Palladium Nanoparticles ◽  
Theory Model ◽  
Collision Theory ◽  
Kinetics Of Formation ◽  
Growth Formation ◽  
Kinetics Of

AbstractThe kinetics of formation of palladium nanoparticles with well-defined morphologies (rods, cubes, MTP icosahedra, bipyramids) was studied using a combination of TEM and dynamic light scattering (DLS). The present study was focused on the role of the concentration and the size of seeds on both the kinetics of growth and the morphology distribution. Results clearly emphasize the role of the seed concentration (and not the size) on the growth kinetics in agreement with a collision theory model.

Dynamic light scattering study of intrinsic colloids of tetravalent actinides

2009 ◽  
Vol 1193 ◽  
Author(s):  
Sumit Kumar ◽  
B.S. Tomar ◽  
V.K. Manchanda
Keyword(s):  
Light Scattering ◽  
Ionic Strength ◽  
Dynamic Light Scattering ◽  
Scattering Measurements ◽  
Scattering Technique ◽  
Kinetics Of Formation ◽  
Dynamic Light Scattering Technique ◽  
Scattering Study ◽  
Kinetics Of ◽  
Light Scattering Technique

AbstractKinetics of formation of intrinsic colloids by tetravelent metal ions, namely, Th(IV), Hf(IV) and Pu(IV) have been studied using the dynamic light scattering technique. The milli-molar solutions of Hf(IV) and Th(IV) were prepared at varying pH (2-4) and ionic strength (0-0.01 M) and the samples were subjected to dynamic light scattering measurements at regular intervals for few days. The results showed that the size of intrinsic colloids varies with pH and ionic strength. In the case of Pu(IV) the concentration of aqueous solutions was 4.5×10−5 M.

Role of ionic strength in the kinetics of formation of the monochelate of nickel(II) with heptane-3,5-dione

1992 ◽  
Vol 24 (4) ◽  
pp. 359-368 ◽  
Author(s):  
María Luisa Moyá ◽  
Amalia Rodriguez ◽  
Francisco Sánchez ◽  
Carlos Blanco ◽  
Michael J. Hynes
Keyword(s):  
Ionic Strength ◽  
Kinetics Of Formation ◽  
Kinetics Of

Dynamic light scattering of DNA: Role of the internal motion

1989 ◽  
Vol 11 (5) ◽  
pp. 745-759 ◽  
Author(s):  
G. Chirico ◽  
P. Crisafulli ◽  
G. Baldini
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Internal Motion

Role of Sucrose in Pectin Gelation:  Static and Dynamic Light Scattering Experiments

2002 ◽  
Vol 35 (21) ◽  
pp. 8147-8151 ◽  
Author(s):  
Donatella Bulone ◽  
Vincenzo Martorana ◽  
Caide Xiao ◽  
Pier Luigi San Biagio
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering

scholarly journals Characteristics and Kinetics of Phosphorus Release from Formulated Fertilizer in Clay Loam Soil

KIMIKA ◽  
2019 ◽  
Vol 30 (2) ◽  
pp. 1-4
Author(s):  
Vernadette J. Soriano ◽  
Veronica P. Migo ◽  
Monet Concepcion Maguyon-Detras ◽  
Catalino G. Alfafara
Keyword(s):  
Light Scattering ◽  
Kinetic Model ◽  
Dynamic Light Scattering ◽  
Release Kinetics ◽  
Phosphorus Release ◽  
Particle Dynamic ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil ◽  
Kinetics Of

A kinetic study for the phosphorus release of a formulated CaHAP-Z fertilizer was done to observe its behavior when applied to clay loam soil. The study of release kinetics of CaHAP-Z was done along with CaHAP and the control fertilizer Solophos™ to determine whether the formulated fertilizer can be an alternative for the conventional fertilizer. Results showed that the formulated fertilizer CAHAP-Z contains 3.73% phosphorus with 513.10 nm particle (Dynamic Light Scattering) indicating that the formulated fertilizer can be classified as a nanofertilizer. The formulated CaHAP-Z fertilizer showed the slowest release kinetics compared to the controls. In addition, this study showed that the simple Elovich kinetic model is the general equation that best fits to describe the phosphorus release of fertilizers.

scholarly journals Studies on Pitting Corrosion of Al–Cu–Li Alloys Part III: Passivation Kinetics of AA2098–T851 Based on the Point Defect Model

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 1912 ◽  
Author(s):  
Elmira Ghanbari ◽  
Alireza Saatchi ◽  
Xiaowei Lei ◽  
Digby D. Macdonald
Keyword(s):  
Barrier Layer ◽  
Potential Model ◽  
Electrochemical Impedance ◽  
Passive Layer ◽  
Charge Carriers ◽  
Theoretical Interpretation ◽  
Defect Model ◽  
Kinetics Of Formation ◽  
Kinetics Of

In this paper, the passivation kinetics of AA2098–T851 was investigated by a fundamental theoretical interpretation of experimental results based on the mixed potential model (MPM). The steady state passive layer formed on the AA2098–T851 in NaHCO3 solution in a CO2 atmosphere upon potentiostatic stepping in the anodic direction followed by stepping in the opposite direction was explored. Potentials were selected in a way that both anodic passive dissolution of the metal and hydrogen evolution reaction (HER) occur, thereby requiring the MPM for interpretation. Optimization of the MPM on the experimental electrochemical impedance spectroscopy (EIS) data measured after each potentiostatic step revealed the important role of the migration of Al interstitials in determining the kinetics of passive layer formation and dissolution. More importantly, it is shown that the inequalities of the kinetics of formation and dissolution of the passive layer as observed in opposite potential stepping directions lead to the irreversibility of the passivation process. Finally, by considering the Butler–Volmer (B–V) equation for the cathodic reaction (HER) in the MPM, and assuming the quantum mechanical tunneling of the charge carriers across the barrier layer of the passive film, it was shown that the HER was primarily controlled by the slow electrochemical discharge of protons at the barrier layer/solution (outer layer) interface.

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